Airborne 12.09.16

AD NUMBER: 2012-04-01

SUMMARY: This AD supersedes an existing
airworthiness directive (AD) for all RR RB211-Trent 800 series
turbofan engines. That AD currently requires removal from service
of certain criticalengine parts based on reduced life limits. This
new AD reduces the life limits of additional critical engine
parts.

This AD was prompted by RR reducing the life limits of
additional critical engine parts.

The FAA is issuing this AD to prevent the failure of critical
rotating parts, which could result in uncontained failure of the
engine and damage to the airplane.